CN105846908A - Multi-path phase difference light frequency hopping secret communication system - Google Patents
Multi-path phase difference light frequency hopping secret communication system Download PDFInfo
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- CN105846908A CN105846908A CN201610168919.0A CN201610168919A CN105846908A CN 105846908 A CN105846908 A CN 105846908A CN 201610168919 A CN201610168919 A CN 201610168919A CN 105846908 A CN105846908 A CN 105846908A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7136—Arrangements for generation of hop frequencies, e.g. using a bank of frequency sources, using continuous tuning or using a transform
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards
Abstract
The invention provides a multi-path phase difference light frequency hopping secret communication system. Two light frequency hopping machines are inserted in two ends of a communication fiber respectively to perform encryption and decryption; each light frequency hopping machine comprises five SFP light transmit-receive modules, one FPGA chip, eight segments of optical fiber time delay lines and one bidirectional array waveguide grating AWG. Transmission fibers between two light frequency hopping machines comprise four light signals with different wavelength; phase difference is introduced to different light signals so that communication data fragments are disorderly concealed in random signals of four channels and are disorganized in time sequence and therefore optical communication security is increased. In the encryption end, different paths of different wavelength are realized through optical fiber time delay lines of different length and then phase difference is generated; in the decryption end, phase alignment of four channels of signals is completed through the introduction of the complementary optical fiber time delay in the frequency hopping machines. The total length of optical fiber time delay lines which are passed through by each signal at the encryption end and the decryption end are identical.
Description
Technical field
The present invention relates to security photo-communication field, particularly relate to multipath difference light frequency hopping secret communication system
System.
Background technology
In the current information age, optical fiber carries the information of magnanimity every day, relates to the Fang Fang of society
Face, face, including civilian, government, business, military etc..But, along with network attack and Eavesdropping
Development, fiber optic communication, while bringing welfare for the mankind, there is also potential safety hazard.True
Showing, in optical fiber, the information of transmission can be ravesdropping, and therefore, how to protect the information of fiber-optic transfer not
It is stolen, becomes a significant problem.
The most conventional method improving communications security is that information source data are carried out algorithm for encryption, such as
AES encryption so that listener-in is difficult to directly obtain useful information, but, along with high-performance calculation skill
The development of art, the cost that cracks of algorithm for encryption constantly reduces, and the security intensity of algorithm for encryption has died down.
It addition, the enormous bandwidth of fiber optic communication makes the quantity of information that need to encrypt the hugest, use algorithm for encryption
Need to carry out substantial amounts of computing, whether on software or hardware, all equipment is proposed the highest wanting
Ask.
Summary of the invention
The invention provides a kind of multipath difference light frequency hopping secret signalling, the data quilt of optic communication
It is divided into fractionlet, after mixing with stochastic signal, is loaded on the carrier wave of multiple different wave length, different ripples
Long optical signal, through different paths, produces phase contrast so that the separating degree between signal fragment is more
Greatly, optical fiber listener-in's capturing information it is prevented effectively from.
The invention provides a kind of light frequency hopping machine, including: the first to the 5th optical transceiver module, process core
Sheet, the first to the 4th fiber delay line and array waveguide grating, wherein:
The optical signal demodulation received from external communication device is become electricity data signal by the first optical transceiver module
Input processing chip；
Process chip and electricity data signal is divided into information fragmentation, information fragmentation is dispersed randomly to chronologically
Four corresponding with the second to the 5th optical transceiver module respectively data channel, and in each data channel
In be partially filled with random noise signal in addition to information fragmentation, then with described electricity data signal
Data in four data channel are sent to phase in the second to the 5th optical transceiver module by identical speed
The optical transceiver module answered；
Second to the 5th optical transceiver module uses the data in corresponding data passage to modulate and export accordingly
Light carrier, the second to the 5th respective light carrier of optical transceiver module has different wave length；
The light carrier of the second to the 5th optical transceiver module output is respectively by the first to the 4th fiber delay time
Line, so that four road optical carriers produce phase contrast each other；And
Four road optical signals of the first to the 4th fiber delay line output are coupled in array waveguide grating
Cheng Yilu complex light also exports.
Present invention also offers a kind of light frequency hopping machine, including: the first to the 5th optical transceiver module, process
Chip, the first to the 4th fiber delay line and array waveguide grating, wherein:
The optical signal received from external fiber is divided into four tunnels by wavelength by array waveguide grating, exports to the
Corresponding fiber delay line in one to the 4th fiber delay line；
Four road fiber delay lines apply time delay to the optical signal of input respectively, it is achieved the phase of four road optical signals
Position alignment also exports to corresponding second to the 5th optical transceiver module；
Second to the 5th optical transceiver module demodulates the signal of telecommunication from corresponding light signal and inputs to processing core
Sheet；
Process chip and extract letter from the four road signals of telecommunication being received from the second to the 5th optical transceiver module
Number fragment is to recover a road electricity data signal, and the electric data signal output recovered is received to the first light
Send out module；
First optical transceiver module uses from processing the electric data signal modulation of chip and exporting a road light
Signal.
Present invention also offers a kind of light frequency hopping machine, including: the first to the 5th optical transceiver module, process
Chip, the first to the 8th fiber delay line and two-way array waveguide grating, wherein:
When this light frequency hopping machine uses at the transmitting terminal that communicates:
The optical signal demodulation received from external communication device is become electricity number by the first optical transceiver module
The number of it is believed that input processing chip；
Process chip and electricity data signal is divided into information fragmentation, information fragmentation is the most random
It is distributed to four corresponding with the second to the 5th optical transceiver module respectively data channel, and
Each data channel is partially filled with random noise signal, then in addition to information fragmentation
With the speed identical with described electricity data signal, the data in four data channel are sent to
A corresponding optical transceiver module in second to the 5th optical transceiver module；
Second to the 5th optical transceiver module uses the data in corresponding data passage to modulate and defeated
Going out corresponding light carrier wave, the second to the 5th respective light carrier of optical transceiver module has different ripple
Long；
The light carrier of the second to the 5th optical transceiver module output is respectively by the first to the 4th light
Fine delay line, so that four road optical carriers produce phase contrast each other；And
Four road optical signals of the first to the 4th fiber delay line output are at bidirectional arrayed waveguide light
Grid are coupled into a road complex light and export；And
When this light frequency hopping machine uses at communication receiver:
The optical signal received from external fiber is divided into four by wavelength by two-way array waveguide grating
Road, exports the corresponding fiber delay line to the 5th to the 8th fiber delay line；
Four road fiber delay lines apply time delay to the optical signal of input respectively, it is achieved four road light letters
Number phase alignment and export to corresponding second to the 5th optical transceiver module；
Second to the 5th optical transceiver module from corresponding light signal demodulate the signal of telecommunication and input to
Process chip；
Process chip to carry from the four road signals of telecommunication being received from the second to the 5th optical transceiver module
Take out signal fragment to recover a road electricity data signal, and by recover electric data signal defeated
Go out to the first optical transceiver module；
First optical transceiver module uses from processing the electric data signal modulation of chip and exporting a road light
Signal.
Accompanying drawing explanation
Fig. 1 shows system structure schematic diagram according to embodiments of the present invention.
Fig. 2 shows the schematic diagram of distributed intelligence fragment on different paths according to embodiments of the present invention.
Fig. 3 shows the information fragmentation distribution after different paths apply time delay according to embodiments of the present invention
Figure.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with concrete real
Execute example, and referring to the drawings, the present invention is described in more detail.
The present inventor proposes, and the frequency hopping coming from radio communication can make up optical communication technology
The deficiency of algorithm for encryption in art.Carrier wave ceaselessly saltus step due to information, it is not known that stealing of frequency hop sequences
The side of listening cannot capture complete information, the most just cannot decrypted.Cognitive based on this, the present invention proposes one
Kind of multipath difference light frequency hopping secret signalling, information fragmentation at the band transmissions of different wave length,
And introduce the fiber delay time of different length so that the phase place of different channel informations exists bigger difference
, the difficulty of capture complete information is not further increased.
Fig. 1 shows system structure schematic diagram according to embodiments of the present invention.As it is shown in figure 1, at this
In system, each slotting for the first Transmission Fibers 1 of two-way communication and the two ends of the second Transmission Fibers 2
Enter a light frequency hopping machine, carry out the encrypting and decrypting of two-way communication.First Transmission Fibers 1 and the second transmission
Each containing 4 wavelength in optical fiber 2, two Transmission Fibers respectively transmit the data in a direction.Light is jumped
Frequently specifically include that inside machine 5 SFP optical transceiver module SFP _ 0, SFP_1, SFP_2, SFP_3,
SFP_4；1 piece of fpga chip；8 sections of fiber delay line T1_a, T1_b, T2_a, T2_b, T3_a,
T3_b and T4_a, T4_b；And 1 two-way array waveguide grating AWG.
Below with Fig. 1 left part for communication transmitting terminal, right part as communication receiver as a example by carry out
Explanation.It will be appreciated that connect for communication with Fig. 1 right part for communication transmitting terminal, left part
Receiving end is also possible.
As it is shown in figure 1, optical transceiver module SFP _ 0 of communication transmitting terminal light frequency hopping machine is fixed wave length light
Optical transceiver module in transceiver module, with commercial optical communication equipment is compatible.Light at communication transmitting terminal is jumped
Frequently, in machine, optical transceiver module SFP _ 0 receives the optical signal from transmitting terminal communication equipment, carries out photoelectricity
Conversion, extracts communication data to be encrypted, inputs fpga chip.Light frequency hopping in communications reception
Machine middle-end, optical transceiver module SFP _ 0 receives the communication data after the deciphering of fpga chip output, adds
It is downloaded on light carrier, sends optical signal to receiving terminal communication equipment.Described communication equipment can be logical
Communication network equipment, such as optical switch, light mouth inserts the optoelectronic transceiver of a SFP or SFP+ encapsulation
Module, carries out bidirectional data transfers with the light frequency hopping machine of native system.
As it is shown in figure 1, in each smooth frequency hopping machine, optical transceiver module SFP _ 1, SFP_2, SFP_3,
SFP_4 is 4 DWDM (high density Wave division multiplexing technology) optical transceiver module, and wavelength is
The DWDM wavelength that International Telecommunication Union (ITU) specifies is appointed and takes 4；These 4 light transmitting-receiving moulds
The signal of telecommunication input/output terminal of block is all connected on fpga chip by microstrip line, light input/output port
It is all connected on fiber delay line.
As it is shown in figure 1, in each smooth frequency hopping machine, two-way array waveguide grating AWG comprises altogether
Draw optical fiber, be wherein complex light in 2 optical fiber, be single-wavelength light in 8 optical fiber for 10, wherein,
4 Single wavelength optical fiber are coupled into a road complex light as input port, 4 road light of input in AWG
After, by a composite fiber output, 1 composite fiber is as input port, 1 tunnel complex light of input
In AWG according to wavelength separated after, by the output of 4 Single wavelength optical fiber.
As shown in Figure 1, delay value is that time delay optical fiber T1_a of Delay1_a is connected to light transmitting-receiving mould
Between the outfan of block SFP_1 and AWG Single wavelength input；Delay value is that delay value is
Time delay optical fiber T1_b of Delay1_b is connected to the input of optical transceiver module SFP _ 1 with AWG's
Between one Single wavelength outfan；Delay value is that time delay optical fiber T2_a of Delay2_a is connected to light receipts
Send out between outfan and a Single wavelength input of AWG of module SFP_2；Delay value is
Time delay optical fiber T2_b of Delay2_b is connected to the input of optical transceiver module SFP _ 2 with AWG's
Between one Single wavelength outfan；Delay value is that time delay optical fiber T3_a of Delay3_a is connected to light receipts
Send out between outfan and a Single wavelength input of AWG of module SFP_3；Delay value is
Time delay optical fiber T3_b of Delay3_b is connected to the input of optical transceiver module SFP _ 3 with AWG's
Between one Single wavelength outfan；Delay value is that time delay optical fiber T4_a of Delay4_a is connected to light receipts
Send out between outfan and a Single wavelength input of AWG of module SFP_4；Delay value is
Time delay optical fiber T4_b of Delay4_b is connected to the input of optical transceiver module SFP _ 4 with AWG's
Between one Single wavelength outfan.Meet between 8 described delay values relation: Delay1_a with
The sum of Delay1_b, Delay2_a's Yu Delay2_b and, Delay3_a's Yu Delay3_b and,
Delay4_a's Yu Delay4_b and, 4 and value equal in magnitude.
As it is shown in figure 1, in each smooth frequency hopping machine, fpga chip and the electricity of 5 optical transceiver modules
Input/output terminal connects, and uses 5 to comprise high speed serialization I/O port, every a pair high-speed serial I/O mouth altogether
Input and output both direction；By the GTX high speed serialization transceiver IP kernel reality carried inside FPGA
Existing high-speed serial data transmission.
In information transmitting terminal, it is as follows that encryption according to embodiments of the present invention realizes process:
At communication transmitting terminal, transmitting terminal communication equipment the optical signal transmission to be encrypted sent enters light and jumps
Frequently after machine, first input optical transceiver module SFP _ 0, demodulate the 1 road signal of telecommunication, pass through high speed serialization
I/O port input fpga chip.
In fpga chip, 1 road signal of input is divided into information fragmentation, and these information fragmentation are pressed
Time sequencing numbered 1,2,3 ... then, these information fragmentation under the control of random sequence,
It is randomly interspersed in 4 output channels, the data rate of these 4 output channels and 1 tunnel of input
Passage is equal；In 4 tunnel output channels, except information fragmentation, remaining idle component is all filled and is made an uproar at random
Acoustical signal；The 4 tunnel output signals that finally obtain are as in figure 2 it is shown, numeral 1,2,3 in figure ...
257,258,259 ... represent the numbering of information fragmentation.4 tunnel output signals of fpga chip are respectively
Entering optical module optical transceiver module SFP _ 1, SFP_2, SFP_3 and SFP_4, modulation is to correspondence
On light carrier.
According to embodiments of the invention, the optical signal of optical transceiver module SFP _ 1 output can be through time delay
For time delay optical fiber T1_a of Delay1_a, the optical signal of optical transceiver module SFP _ 2 output can pass through
Time delay is time delay optical fiber T2_a of Delay2_a, and the optical signal of optical transceiver module SFP _ 3 output is permissible
It is time delay optical fiber T3_a of Delay3_a through time delay, the optical signal of optical transceiver module SFP _ 4 output
Can be time delay optical fiber T4_a of Delay4_a through time delay, 4 road signals produce phase contrast, enter one
Step improves the randomness of information fragmentation, as shown in Figure 3, each numeral labelling 1 in Fig. 3,1023,
1027 ... 7378 grades represent the numbering of information fragmentation.
Introduce 4 road light after phase contrast and input 4 Single wavelength input optical fibres of two-way AWG, coupling
Cheng Yilu complex light, inputs Transmission Fibers 1.
At information receiving end, realize process according to the deciphering of the present invention as follows:
Complex light in Transmission Fibers 1 enters light frequency hopping machine, and input array waveguide optical grating AWG answers
Closing optic fibre input end, be divided into 4 tunnels by wavelength, now there is phase contrast in 4 circuit-switched data, such as accompanying drawing
Shown in 3.
4 road light are respectively through time delay optical fiber, the light letter of optical transceiver module SFP _ 1 the most to be entered module
Number through optical fiber T1_b that delay value is Delay1_b；Optical transceiver module SFP _ 2 to be entered module
Optical signal is through optical fiber T2_b that delay value is Delay2_b；Optical transceiver module SFP _ 3 to be entered mould
The optical signal of block is through optical fiber T3_b that delay value is Delay3_b；Optical transceiver module SFP _ 4 to be entered
The optical signal of module is through optical fiber T4_b that delay value is Delay4_b.After time delay, complete number
According to phase alignment, 4 channel signals after alignment are as shown in Figure 2.
Complete 4 road optical signals of phase alignment, input respectively optical transceiver module SFP _ 1, SFP_2,
SFP_3 and SFP_4, demodulates the signal of telecommunication, and the 4 road signals of telecommunication input FPGA by high speed serialization I/O port
Chip.
In fpga chip, 4 road signals of input are divided into information fractionlet, little from these information
Fragment extracts effective information fragment, abandons random noise signal fragment.The realization of this process based on
Synchronous head detection technique performs, and with specific synchronous head as initiating terminal, is divided into isometric by each road signal
Information fragmentation fragment, fragment length with encryption end numbering chip length equal, during for each
Carving, in 4 road signals, the fragment having 1 road signal is useful signal fragment, remaining 3 road signal
Information fragmentation is noise signal, according to a string random sequence identical with ciphering process, selects effectively letter
Breath fragment, as output, the information fragmentation on remaining 3 tunnel is dropped, and finally recovers 1 tunnel original logical
Letter data, completes deciphering.
The 1 road communication data that decryption restoration goes out, is exported by fpga chip by high-speed serial I/O
SFP_0 optical module, modulates on light carrier, exports the communication network device of correspondence from light frequency hopping machine.
It is noted that be above with on the left of Fig. 1 for communication transmitting terminal, right side is that communication receiver is carried out
Explanation.When with on the right side of Fig. 1 for communication transmitting terminal, when left side is communication receiver, right side light frequency hopping
Machine performs the corresponding function of communication transmitting terminal described above, and left side light frequency hopping machine performs above description
The corresponding function of communication receiver, composite optical signal is transmitted by optical fiber 2.
In the embodiment shown in fig. 1, the light frequency hopping machine at optical fiber two ends has transmission and receive capabilities simultaneously,
In each smooth frequency hopping machine, optical transceiver module SFP _ 0, SFP_1, SFP_2, SFP_3 and SFP_4
In each have simultaneously from optical signal demodulation go out electricity data signal export FPGA and use from
The function of the electric data signal modulation output optical signal of FPGA.But, according to embodiments of the invention,
The light frequency hopping machine at optical fiber two ends can only have sending function or only have receive capabilities.Such as, for
Each optical fiber in optical fiber 1 and 2, its two ends can connect respectively a transmitting terminal light frequency hopping machine and
One receiving terminal light frequency hopping machine.For transmitting terminal light frequency hopping machine, wherein each parts and function thereof are as above
For described in communication transmitting terminal light frequency hopping machine；For receiving terminal light frequency hopping machine, wherein each parts and
Function is as described above for described in communication receiver light frequency hopping machine.
According to embodiments of the invention, the optical transceiver module in the light frequency hopping machine of communication transmitting terminal can replace
It is changed to the module only with sending function, and the optical transceiver module in the light frequency hopping machine of communication receiver can
To replace with the module only with receive capabilities.
According to embodiments of the invention there is following one or more advantage:
1) by FPGA igh-speed wire-rod production line, it is achieved the optical wavelength rapid jumping of signal carrier, make
The information of obtaining is difficult to be trapped, effectively protection optic communication safety；
2) by introducing the fiber delay time of different length so that be loaded into the signal on different light carrier
Fragment produces the difference in phase place, upsets signal further hiding, further from the time
Increase the difficulty of information acquisition；
3) process that realizes is simple, and based on hardware enciphering and deciphering, encryption/decryption speed is fast, it is not necessary to carry out complexity,
Substantial amounts of computing.
Multipath difference light frequency hopping secret signalling according to embodiments of the present invention can be effectively improved
The secret and safe performance of fiber-optic transfer, can be applicable to military unit, bank, government department etc..
Particular embodiments described above, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe, be it should be understood that the foregoing is only the present invention specific embodiment and
, be not limited to the present invention, all within the spirit and principles in the present invention, that is done any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (14)
1. a light frequency hopping machine, including: the first to the 5th optical transceiver module, process chip, first
To the 4th fiber delay line and array waveguide grating, wherein:
The optical signal demodulation received from external communication device is become electricity data signal by the first optical transceiver module
Input processing chip；
Process chip and electricity data signal is divided into information fragmentation, information fragmentation is dispersed randomly to chronologically
Four corresponding with the second to the 5th optical transceiver module respectively data channel, and in each data channel
In be partially filled with random noise signal in addition to information fragmentation, then with described electricity data signal
Data in four data channel are sent to phase in the second to the 5th optical transceiver module by identical speed
The optical transceiver module answered；
Second to the 5th optical transceiver module uses the data in corresponding data passage to modulate and export accordingly
Light carrier, the second to the 5th respective light carrier of optical transceiver module has different wave length；
The light carrier of the second to the 5th optical transceiver module output is respectively by the first to the 4th fiber delay time
Line, so that four road optical carriers produce phase contrast each other；And
Four road optical signals of the first to the 4th fiber delay line output are coupled in array waveguide grating
Cheng Yilu complex light also exports.
Smooth frequency hopping machine the most according to claim 1, wherein:
First optical transceiver module is compatible with the optical transceiver module in commercial optical communication equipment；And
Optical carrier wavelength corresponding to second to the 5th optical transceiver module is the DWDM ripple that ITU specifies
Length is appointed and takes four.
Smooth frequency hopping machine the most according to claim 1, wherein:
Processing chip is fpga chip, by five high speed serialization transceivers respectively with first to the 5th
Optical transceiver module exchange data.
4. a light frequency hopping machine, including: the first to the 5th optical transceiver module, process chip, first
To the 4th fiber delay line and array waveguide grating, wherein:
The optical signal received from external fiber is divided into four tunnels by wavelength by array waveguide grating, exports to the
Corresponding fiber delay line in one to the 4th fiber delay line；
Four road fiber delay lines apply time delay to the optical signal of input respectively, it is achieved the phase of four road optical signals
Position alignment also exports to corresponding second to the 5th optical transceiver module；
Second to the 5th optical transceiver module demodulates the signal of telecommunication from corresponding light signal and inputs to processing core
Sheet；
Process chip and extract letter from the four road signals of telecommunication being received from the second to the 5th optical transceiver module
Number fragment is to recover a road electricity data signal, and the electric data signal output recovered is received to the first light
Send out module；
First optical transceiver module uses from processing the electric data signal modulation of chip and exporting a road light
Signal.
Smooth frequency hopping machine the most according to claim 4, wherein:
First optical transceiver module is compatible with the optical transceiver module in commercial optical communication equipment；And
Optical carrier wavelength corresponding to second to the 5th optical transceiver module is the DWDM ripple that ITU specifies
Length is appointed and takes four.
Smooth frequency hopping machine the most according to claim 4, wherein:
Processing chip is fpga chip, by five high speed serialization transceivers respectively with first to the 5th
Optical transceiver module exchange data.
Smooth frequency hopping machine the most according to claim 4, wherein, processes chip from being received from second
Signal fragment is extracted to recover road electricity data in the four road signals of telecommunication of the 5th optical transceiver module
Signal includes:
For each road signal of telecommunication, with specific synchronous head as initiating terminal, this road signal of telecommunication is divided into
Long information fragmentation fragment, the information fragmentation length that fragment length uses with encryption end is equal, for often
In one moment, in the four road signals of telecommunication, the information fragmentation fragment of Dou You mono-road signal is useful signal fragment,
The information fragmentation fragment of its excess-three road signal is noise signal, according to a string identical with ciphering process with
Machine sequence, selects effective information fragment to be dropped as output, the information fragmentation fragment on its excess-three road,
Thus recover a described road electricity data signal.
8. a light frequency hopping machine, including: the first to the 5th optical transceiver module, process chip, first
To the 8th fiber delay line and two-way array waveguide grating, wherein:
When this light frequency hopping machine uses at the transmitting terminal that communicates:
The optical signal demodulation received from external communication device is become electricity number by the first optical transceiver module
The number of it is believed that input processing chip；
Process chip and electricity data signal is divided into information fragmentation, information fragmentation is the most random
It is distributed to four corresponding with the second to the 5th optical transceiver module respectively data channel, and
Each data channel is partially filled with random noise signal, then in addition to information fragmentation
With the speed identical with described electricity data signal, the data in four data channel are sent to
A corresponding optical transceiver module in second to the 5th optical transceiver module；
Second to the 5th optical transceiver module uses the data in corresponding data passage to modulate and defeated
Going out corresponding light carrier wave, the second to the 5th respective light carrier of optical transceiver module has different ripple
Long；
The light carrier of the second to the 5th optical transceiver module output is respectively by the first to the 4th light
Fine delay line, so that four road optical carriers produce phase contrast each other；And
Four road optical signals of the first to the 4th fiber delay line output are at bidirectional arrayed waveguide light
Grid are coupled into a road complex light and export；And
When this light frequency hopping machine uses at communication receiver:
The optical signal received from external fiber is divided into four by wavelength by two-way array waveguide grating
Road, exports the corresponding fiber delay line to the 5th to the 8th fiber delay line；
Four road fiber delay lines apply time delay to the optical signal of input respectively, it is achieved four road light letters
Number phase alignment and export to corresponding second to the 5th optical transceiver module；
Second to the 5th optical transceiver module from corresponding light signal demodulate the signal of telecommunication and input to
Process chip；
Process chip to carry from the four road signals of telecommunication being received from the second to the 5th optical transceiver module
Take out signal fragment to recover a road electricity data signal, and by recover electric data signal defeated
Go out to the first optical transceiver module；
First optical transceiver module uses from processing the electric data signal modulation of chip and exporting
One road optical signal.
Smooth frequency hopping machine the most according to claim 8, wherein:
First optical transceiver module is compatible with the optical transceiver module in commercial optical communication equipment；And
Optical carrier wavelength corresponding to second to the 5th optical transceiver module is the DWDM ripple that ITU specifies
Length is appointed and takes four.
Smooth frequency hopping machine the most according to claim 8, wherein:
Processing chip is fpga chip, by five high speed serialization transceivers respectively with first to the 5th
Optical transceiver module exchange data.
11. smooth frequency hopping machines according to claim 8, wherein:
First and the 5th fiber delay line be connected in parallel on the second optical transceiver module and two-way array waveguide grating
Between, and transmit rightabout optical signal；
Second and six fibers delay line be connected in parallel on the 3rd optical transceiver module and two-way array waveguide grating
Between, and transmit rightabout optical signal；
3rd and the 7th fiber delay line is connected in parallel on the 4th optical transceiver module and two-way array waveguide grating
Between, and transmit rightabout optical signal；
4th and the 8th fiber delay line is connected in parallel on the 5th optical transceiver module and two-way array waveguide grating
Between, and transmit rightabout optical signal；And
First and the 5th fiber delay line time delay sum, second and six fibers delay line time delay it
With, the 3rd and the 7th the time delay sum of fiber delay line and prolonging of the 4th and the 8th fiber delay line
Time sum equal.
12. smooth frequency hopping machines according to claim 8, wherein, process chip from being received from second
Signal fragment is extracted to recover road electricity data in the four road signals of telecommunication of the 5th optical transceiver module
Signal includes:
For each road signal of telecommunication, with specific synchronous head as initiating terminal, this road signal of telecommunication is divided into
Long information fragmentation fragment, the information fragmentation length that fragment length uses with encryption end is equal, for often
In one moment, in the four road signals of telecommunication, the information fragmentation fragment of Dou You mono-road signal is useful signal fragment,
The information fragmentation fragment of its excess-three road signal is noise signal, according to a string identical with ciphering process with
Machine sequence, selects effective information fragment to be dropped as output, the information fragmentation fragment on its excess-three road,
Thus recover a described road electricity data signal.
13. 1 kinds of communication systems are including transmitting two optical fiber of optical signal in opposite direction, the most right
In each optical fiber, connect the light frequency hopping according to any one of with good grounds claims 1 to 3 at transmitting terminal
Machine, connects the light frequency hopping machine according to any one of with good grounds claim 4～7 at receiving terminal.
14. 1 kinds of communication systems, including transmitting two optical fiber of optical signal in opposite direction, these two
Optical fiber is connected in parallel between two light frequency hopping machines according to Claim 8～according to any one of 12.
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